159 CSNK1A1 IS NORMALLY EXPRESSED AND UNMUTATED IN MDS PATIENTS WITHOUT DEL(5Q) BEFORE AND UNDER TREATMENT WITH LENALIDOMIDE. Issue 1 (April 2015) - Chesnais, V.; Passet, M.; Bondu, S.; Toma, A.; Fenaux, P.; Dreyfus, F.; Fontenay, M.; Kosmider, O.; GFM,